Blank for conical vessels



1,637,252 July 1927' c. F. DAWSON BLANK FOR CONICAL VESSELS Filed Feb.9, 1924 I5 Sheets-Sheetl avwc mtozi ace/ 1,637,252 July 1927' c. F. DAWSON BLANK FOR CONICAL VESSELS Filed Feb.9, 1924 3 Sheets-Shut 2 MWhMW.

v 1,637,252 y 1927' c. F. nAwsor l BLANK FOR CONIGAL VESSELS.

Filed Feb. 9. 1924 :5 Sheets-Sheet 5 Batented July 26,

. UNITED STATES (1,637,252 PATENT orncs.

cm I. mml, OI ml, PII'IIYLVL'IIA, AS81610]; IO IIDIVDUAL nnnlnra cur 001mm, 110., OI ml, PII'NBYLVAIIA, A- CORPORATION 01' man.-

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Application Rm 8, 1. lerlal I0. 1,705.

This invention relates to improvements in blanks for forming conical vessels.

The object of the invention is'to prov de an improved form of blank capable of being readily formed in conical shapeand that will result; in the provision of an, improved :onstruc n of conical vessel.

The invention, with other objects and advantages thereof wilf be understood from the hereinafter contained detail description,

when considered in connection with the accompanying drawings, forming part hereof, and illustrating one embodiment of the in vention.

In the drawings: I Figure 1 is a lan view of a blank constructed in accor ance with the present in vention.

F i 2 is a plan .view of the blank, illusao trat Figure 1, when folded flat u 11 itself on a radius bi-secting the arcuate y curved 2d of the blank.

Fig. 3 is a plan view illustrating the arra ment of the mandrel relative to the I b at the beginning of the forming operation.

F' 4 is a similar view illustrating the man rel and blank at a preliminary stage of the forming o rat-ion. Q Fig. 5 is a like view showin' the form of the blank at a further stage 0 the forming operation. V

F' 6'and 7 illustrate advanced stages of the orming operation.

Fig. 8 is a side elevation of a conical vessel constructed from the blank.

Fig. 9 is a part section and side elevation of the completed vessel.

Referring to a detail description of the articular embodiment of the invention ilustrated in the drawings, A designates the blankconstructed of paper or other. thin flexible material suitable for the purpose. The blank A has a curved edge B extending generally in the arc of a circle, and two substantially straight edges OD and FD intersecting each other and said curved edge B, the entireblank being wholly defined by said edges. The major portion of the edges C-D and F-D extend in straight lines. The edges (7-D and FD may, as shown, bend slightly inwardly at C-F toward the blank body to merge in curves with the ends of the curved edge B. Said edges C-D, F -D lie to the outer side of the radii extending to their respective points of intersection with the curved ed B, and extend at\substantially ual ang es to said radii, the radial center of the arcuate edge B lying within the body of the blank. The edge C-D near the point of intersection of the lines C--D, FD has an inward bend d, and at the ppint of intersection of the ed CD, Fgthese edges bend inwar joining each other in a curve, the edge G- and the edge F.D, if the'blank is folded upon itself along a radius bi-secting the curved edge B (as illustrated Figure '2 of the drawings), not coinciding throughout but being separated by an area H.. I

In the particular exemplification of the invention shown in the drawings, the blank A has an application of adhesive or cementitious material over an area bounded b the edge F-D, the dotted line J-K an the edgel portions from F to J and D to K.

e blank is adapted to be formed into a conical vessel by a cone sha mandrel M in the followi manner. he mandrel M is placed u n t e blank A as illustrated Figure 3 of t e drawings, so that the apex -m of the mandrel engages the blank at the point 6, the center of the curved ed B, and so that the mandrel contacts with t e blank along the line bC, (indicated by dottedline), the radius extending from the radial center b of the curved edge B to the int of intersection of the edge CD wit the curved edge B. The blank at the point C. is held fixed to the mandrel, and with the apex m of the mandrel held fixed at the center I), the mandrel is rolled upon the blank, as illustrated Figures 4 to 6 of the drawings. At the prelimina stageof the forming operation, the edge ED and the adjacent marginal portion of the blank, excepting that portion thereof at the point C which is held fixed to the mandrel, does not lay against the mandrel but extends in s aced relation therewith in a curl, as shown igure 4 of the drawings. As the formin operation proceeds, that portion of the blank A between the apex m of the mandrel M and the point D of the blank A, is lifted out of the original plane of the blank, and the point D moves about 6, as a center, upwardin the direction of the curved edge B, as i lustrated in Figures 6 and 7 of the drawings. During the winding of the blank A about the mandrel M, as the point 0 ap- 1 roaches the edge B adjacent F, there has been sufiicient bending movement develo ed along the edge C'D so thata natural old begins at a point N, as seen in Figure 6, and results in a fold along the line N-b.

With the blank A provided with adhesive or cementitious material over an area F-J-D-K, it is apparent that a ortion of theblank A adiacent edgle C approximately that I ounded y D'- b comes in contact with the adhesive or cementitious material, resultin in a bond or union of the two surfaces yin generally igure 6 of surfaces referred to have been secured together, there is still a portion of the blank djacent to edge F-D namely F- -D, N-b

.bearin' bonding material, that is exposed,

andw ich in the continuation of the winding operation, as indicated Figure 6 of the I drawings, is brought in contact with, and

overlaps and is cemented to the outer surface'of the blank A that has already been 'formedto the desired conical shape, the vessel, and the sealing and reinforcin of the same being thus com leted as il ustrated Fi area 8 and 9 of the rawingls.

s will be appreciated, t e particular form of blank hereinbefore described, readily lends itself or is peculiarly adapted to be shaped up in the form desired and results in the provision of a conical vessel structure of a very efiicient nature.

For some purposes it may be desirable to impregnate or coat the material from which the blank is cut, or the blank after bein cut, or the conical vessel after being formed from the blank, with a wax or fusible cementitious material which in itself is capable of being used to bind the overlapping layers of the blank in the formed conical vessel together.

While a specific embodiment of the invention is illustrated in the drawings, it will of course be understood that changes and modifications in the articular construction shown, and the ca mg out of the invention in other forms, as will appeal to those skilled in the art and falling within the scope of the appended claims, may be practiced without eparting from the spirit of the invention.

What I claim is:

1. A blank for forming conical vessels, said blank having an arcuately curved edge and two substantially straightedges intersecting each other and said curved edge, the radial center of said curved edge lying within the blank, said substantially straight edges making substantially equal angles with radii to their respective points of intersection with the curved ed e, and one of said substantially straight e ges havin an inward bend near and extending to t e oint of intersection of said edges, the blank eing adapted to be bent to conical form about the radial center of the curved edge thereof as the central point of bending.

2. A blank for forming conical vessels, said blank having an arcuately curved edge and two substantially straight edges intersecting each other and said curved edge, the radial center of said curved edge lying with in the blank, said substantlally straight edges making substantially equal angles with ra ii to their respective points of intersection with the curved ed e, and one of said substantially straight e ges havin an inward bend near and extendin to t e oint of intersection of said edges, t e blank ing adapted to be bent to conical form about the radial center of the curved edge thereof as the central point of bending, and said blank havin an adhesive substance applied to the marginal edge portion thereof opposite the substantiall straight edge portion that has said inwar band.

In testimony whereof I hereunto aifix my 

